Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1952__125_160322, author = {T. Kato}, title = {Perturbation {Theory} of {Semi-Bounded} {Operators.}}, journal = {Mathematische Annalen}, pages = {435--447}, publisher = {mathdoc}, volume = {125}, year = {1952}, zbl = {0050.34502}, url = {http://geodesic.mathdoc.fr/item/MAN_1952__125_160322/} }
T. Kato. Perturbation Theory of Semi-Bounded Operators.. Mathematische Annalen, Tome 125 (1952), pp. 435-447. http://geodesic.mathdoc.fr/item/MAN_1952__125_160322/